M. F. S. Abdillah, E. N. Hidayah, T. A. Rachmanto, and N. L. A. Mukharomah, “Analyze the tray Spacing Effect in Tray Aerator Reactor in Increasing Dissolved Oxygen and the Application on Groundwater”, ajarcde, vol. 10, no. 2, pp. 501–504, Jun. 2026.